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/*
LUFA Library
Copyright (C) Dean Camera, 2017.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
/*
Copyright 2017 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, distribute, and sell this
software and its documentation for any purpose is hereby granted
without fee, provided that the above copyright notice appear in
all copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the name of the author not be used in
advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
The author disclaims all warranties with regard to this
software, including all implied warranties of merchantability
and fitness. In no event shall the author be liable for any
special, indirect or consequential damages or any damages
whatsoever resulting from loss of use, data or profits, whether
in an action of contract, negligence or other tortious action,
arising out of or in connection with the use or performance of
this software.
*/
#define __INCLUDE_FROM_USB_DRIVER
#include "../../Core/USBMode.h"
#if defined(USB_CAN_BE_DEVICE)
#define __INCLUDE_FROM_MS_DRIVER
#define __INCLUDE_FROM_MASSSTORAGE_DEVICE_C
#include "MassStorageClassDevice.h"
void MS_Device_ProcessControlRequest(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
{
if (!(Endpoint_IsSETUPReceived()))
return;
if (USB_ControlRequest.wIndex != MSInterfaceInfo->Config.InterfaceNumber)
return;
switch (USB_ControlRequest.bRequest)
{
case MS_REQ_MassStorageReset:
if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
{
Endpoint_ClearSETUP();
Endpoint_ClearStatusStage();
MSInterfaceInfo->State.IsMassStoreReset = true;
}
break;
case MS_REQ_GetMaxLUN:
if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
{
Endpoint_ClearSETUP();
while (!(Endpoint_IsINReady()));
Endpoint_Write_8(MSInterfaceInfo->Config.TotalLUNs - 1);
Endpoint_ClearIN();
Endpoint_ClearStatusStage();
}
break;
}
}
bool MS_Device_ConfigureEndpoints(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
{
memset(&MSInterfaceInfo->State, 0x00, sizeof(MSInterfaceInfo->State));
MSInterfaceInfo->Config.DataINEndpoint.Type = EP_TYPE_BULK;
MSInterfaceInfo->Config.DataOUTEndpoint.Type = EP_TYPE_BULK;
if (!(Endpoint_ConfigureEndpointTable(&MSInterfaceInfo->Config.DataINEndpoint, 1)))
return false;
if (!(Endpoint_ConfigureEndpointTable(&MSInterfaceInfo->Config.DataOUTEndpoint, 1)))
return false;
return true;
}
void MS_Device_USBTask(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
{
if (USB_DeviceState != DEVICE_STATE_Configured)
return;
Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataOUTEndpoint.Address);
if (Endpoint_IsOUTReceived())
{
if (MS_Device_ReadInCommandBlock(MSInterfaceInfo))
{
if (MSInterfaceInfo->State.CommandBlock.Flags & MS_COMMAND_DIR_DATA_IN)
Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataINEndpoint.Address);
bool SCSICommandResult = CALLBACK_MS_Device_SCSICommandReceived(MSInterfaceInfo);
MSInterfaceInfo->State.CommandStatus.Status = (SCSICommandResult) ? MS_SCSI_COMMAND_Pass : MS_SCSI_COMMAND_Fail;
MSInterfaceInfo->State.CommandStatus.Signature = CPU_TO_LE32(MS_CSW_SIGNATURE);
MSInterfaceInfo->State.CommandStatus.Tag = MSInterfaceInfo->State.CommandBlock.Tag;
MSInterfaceInfo->State.CommandStatus.DataTransferResidue = MSInterfaceInfo->State.CommandBlock.DataTransferLength;
if (!(SCSICommandResult) && (le32_to_cpu(MSInterfaceInfo->State.CommandStatus.DataTransferResidue)))
Endpoint_StallTransaction();
MS_Device_ReturnCommandStatus(MSInterfaceInfo);
}
}
if (MSInterfaceInfo->State.IsMassStoreReset)
{
Endpoint_ResetEndpoint(MSInterfaceInfo->Config.DataOUTEndpoint.Address);
Endpoint_ResetEndpoint(MSInterfaceInfo->Config.DataINEndpoint.Address);
Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataOUTEndpoint.Address);
Endpoint_ClearStall();
Endpoint_ResetDataToggle();
Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataINEndpoint.Address);
Endpoint_ClearStall();
Endpoint_ResetDataToggle();
MSInterfaceInfo->State.IsMassStoreReset = false;
}
}
static bool MS_Device_ReadInCommandBlock(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
{
uint16_t BytesProcessed;
Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataOUTEndpoint.Address);
BytesProcessed = 0;
while (Endpoint_Read_Stream_LE(&MSInterfaceInfo->State.CommandBlock,
(sizeof(MS_CommandBlockWrapper_t) - 16), &BytesProcessed) ==
ENDPOINT_RWSTREAM_IncompleteTransfer)
{
if (MSInterfaceInfo->State.IsMassStoreReset)
return false;
}
if ((MSInterfaceInfo->State.CommandBlock.Signature != CPU_TO_LE32(MS_CBW_SIGNATURE)) ||
(MSInterfaceInfo->State.CommandBlock.LUN >= MSInterfaceInfo->Config.TotalLUNs) ||
(MSInterfaceInfo->State.CommandBlock.Flags & 0x1F) ||
(MSInterfaceInfo->State.CommandBlock.SCSICommandLength == 0) ||
(MSInterfaceInfo->State.CommandBlock.SCSICommandLength > 16))
{
Endpoint_StallTransaction();
Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataINEndpoint.Address);
Endpoint_StallTransaction();
return false;
}
BytesProcessed = 0;
while (Endpoint_Read_Stream_LE(&MSInterfaceInfo->State.CommandBlock.SCSICommandData,
MSInterfaceInfo->State.CommandBlock.SCSICommandLength, &BytesProcessed) ==
ENDPOINT_RWSTREAM_IncompleteTransfer)
{
if (MSInterfaceInfo->State.IsMassStoreReset)
return false;
}
Endpoint_ClearOUT();
return true;
}
static void MS_Device_ReturnCommandStatus(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
{
Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataOUTEndpoint.Address);
while (Endpoint_IsStalled())
{
#if !defined(INTERRUPT_CONTROL_ENDPOINT)
USB_USBTask();
#endif
if (MSInterfaceInfo->State.IsMassStoreReset)
return;
}
Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataINEndpoint.Address);
while (Endpoint_IsStalled())
{
#if !defined(INTERRUPT_CONTROL_ENDPOINT)
USB_USBTask();
#endif
if (MSInterfaceInfo->State.IsMassStoreReset)
return;
}
uint16_t BytesProcessed = 0;
while (Endpoint_Write_Stream_LE(&MSInterfaceInfo->State.CommandStatus,
sizeof(MS_CommandStatusWrapper_t), &BytesProcessed) ==
ENDPOINT_RWSTREAM_IncompleteTransfer)
{
if (MSInterfaceInfo->State.IsMassStoreReset)
return;
}
Endpoint_ClearIN();
}
#endif
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